Have any other countries set a target date to stop using
cheques/checks?

In UK news today; cheques (or Checks for American readers) will be
phased out by October 2018 due to the payment method being in
"terminal decline", but only if adequate alternatives are
developed.

Banks and credit providers have been investing in chips which allow
a customer to pay when the chip is pushed against a sensor, known
as contactless technology. Using a mobile phone to pay is another
alternative.